hannay



(No Model.)

J. B. HANNAY. FURNACE FOR HEATING WHEEL TIRES..

No. 385,925. P88 111; 3 1 1 10, 1888.

N. PETERS, vmvumo n hen Washinglon, 04 C UNITE ATENT FFICE FURNACE FORHEATING WHEEL-TIRES.

SPECIFICATION forming part of Letters Patent No. 385,925. dated July 10,1888.

Application filed February '7, 1888. Serial No. 263,284. (No model.)

To aZZ whom it may concern:

Be it known that I, JAMES BALLANTYNE HANNAY, a subject of the Queen ofGreat Brit am and Ireland, resident at Glasgow, in the county of Lanark,Scotland, have invented an Improvement in Furnaces for Heating\Vheel-Tires and other Similar Articles, of which the following is aspecification.

The object of my invention is to provide a furnace combined with heatingapparatus specially adapted for rapidly heating such articles aswheel-tires,and one which can be used intermittently and with greateconomy. For heating the furnaceIemploy whatis knownasa Pyrigcn burner,which is a spray-lamp modified to adapt it for heating purposes. Theconstruction of the Pyrigen burner constitutcs no part of my presentinvention, as various modifications of spray-lamps or burners may beused; but I may here state that from the kind of burner indicated averycheap oil is by air under pressure made to issue in a strongjet of finespray which is ignited.

For the purposes of my present invention a considerable air-pressure isemployed-say fifteen to twenty pounds per square inchand the spray-jetis directed so as to impinge repeatedly on the internal surface of thefur nace-ehamber, such internal surface being of fire-brick. Thefire-brick thus impinged on becomes intensely heated, and thiscondition, combined with the agitation and violent intermixing of theimpinging spray, renders its combustion very complete, and results inthe development of very great heat from a comparatively very smallsupply of the liquid fuel.

On the accompanying sheet of explanatory drawings, Figures 1 and 2 arevertical and horizontal sections of a horizontal arrangement of myfurnace, and Figs. 3 and 4 are a vertical section and an end elevationof a vertical arrangement thereof.

The furnace shown in Figs. 1 and 2 is constructcd for heating awhecl-tire, T, in a horizontal position. The furnacechamber F is in acircular form corresponding to the tire. The center, (J, is shown asbuilt up, so that the furnace-chamber is really of an annular form; butthis is immaterial, as the main current of the flames or fire gaseswould pass near the outer circumference even with the center part, 0,not built up. When a tire, T, has been placed in the furnacechamber Fand is about to be heated, a roof-piece or cover, R, which consists ofan iron frame with fire-brick slabs, is lowered down so as to close thefurnace. This cover It is suspended by means of a chain passing overpulleys to a counter-weight, and is made with an opening at onepart,over which a short chimney, S, is fixed for the escape of the usedfire-gases. The Pyrigen burner P is inserted into a tangential or nearlytangential opening in the furnace-chamber F, and the ignited jet ofspray issuing from it passes round .the annular space, the current beingrepeatedly reflected or bent by impinging on the circumferential orconcave surface of the chamber F. Between the inlet-opening for the jetand the outlet to the chimney S the passage is blocked by insertingpieces, B, of fire brick or any convenient refractory material. In thevertical arrangement of furnace shown in Figs. 3 and 4 thecircumferential or concave part of the furnace-chamber F does not form acomplete circle, part being, as it were, cut away to allow space forintroducing and removing the tire T, doors D being provided for closingthe opening. The Pyrigen burner P is placed so as to direct the ignitedjet of spray horizontally and tangentially, or nearly so, to thecircular concave part of the furnacechamber F. The current of flames orfire gases passes round the circular part, extending to about asemi-circle, and envelops the tire Tin its passage,the gases finallypassing off through a chimney, S. During the time that the tire is beingheated it is frequently moved partly round by means of any convenientinstrument introduced through the partly-opened doors D. In Fig. 2 thereis shown in plan the tank K to contain the oil for supplying the Pyrigenburner, and a similar tank, K, is shown in elevation in Fig. 3. Thecompressed air is led to the burner by a pipe from any suitablecompressing apparatus.

Vhat I claim as my invention is- In combination,as a furnace for heatingtires and the like articles, a furnacechambcr made with a concave innerside or surface of fire to this specification in the presence of twosubbrick of a shape corresponding to that of the scribing witnesses.

article to be heated, and an oil-spray burner Worked with compressed airand placed to pro ject the ignited spray-jet in a direction nearlyHANNAY Witnesses:

EDMUND HUNT,

DAVID FERGUSON.

5 tangential to the said concave surface, substantially as herein setforth. I

In testimony whereof I have signed my name

